How To Draw Brushes Or Shape Using Path When Moving Finger Fast In Andorid Canvas (generate Missing Point When User Move Finger Fast)

Im really confuse that how can i draw professional brushes in android, im drawing circle using path when user moves its finger on screen but when user move its finger slow the numb

Solution 1:

Ok At last i find solution. this is how im getting all the points , note that this a theorem called Bresenham's line algorithm and its only works with integer, this is how im getting all the point , move finger fast or slow point will always be same :D

//x0,y0 , is the starting point and x1,y1 are current pointspublic List<PointF> findLine( int x0, int y0, int x1, int y1)
{
    List<PointF> line = newArrayList<PointF>();

    intdx= Math.abs(x1 - x0);
    intdy= Math.abs(y1 - y0);

    intsx= x0 < x1 ? 1 : -1;
    intsy= y0 < y1 ? 1 : -1;

    interr= dx-dy;
    int e2;

    while (true)
    {

        line.add(newPointF(x0,y0));

        if (x0 == x1 && y0 == y1)
            break;

        e2 = 2 * err;
        if (e2 > -dy)
        {
            err = err - dy;
            x0 = x0 + sx;
        }

        if (e2 < dx)
        {
            err = err + dx;
            y0 = y0 + sy;
        }
    }
    return line;
}

How im using this function for my brush,

//radius of circleint rc = (int) (20 +(this.paintStrokeWidth/5));
            //getting the points of line
            List<PointF> pointFC =findLine((int)this.startX,(int) this.startY,(int) x, 
            (int) y);
            //setting the index of first pointint p1 = 0;
            //will check if change occur
            boolean change = false;

            for(int l=1; l<pointFC.size(); l++){

                //getting distance between two pints float d = distanceBetween(pointFC.get(p1),pointFC.get(l));
                if(d>rc){
                    // we will add this point for draw//point is a list of PointF //declared universally
                    points.add(new PointF(pointFC.get(l).x,pointFC.get(l).y));
                    we will change the index of last point
                    p1 = l-1;
                    change = true;

                }
            }
            if(points.size() >0){
                path.reset();
                DrawCircleBrush(points);
            }

            if(change){
                we will cahnge the starts points, //set them as last drawn pointsthis.startX = points.get(points.size()-1).x;
                this.startY = points.get(points.size()-1).y;
            }

   //Distance betwenn pointsprivatefloatdistanceBetween(PointF point1,PointF point2) {
        return (float) Math.sqrt(Math.pow(point2.x - point1.x, 2) +  
        Math.pow(point2.y - point1.y, 2));
    }

//this is how im drawing my circle brushprivatevoidDrawCircleBrush(List<PointF> points) {

        Path path = this.getCurrentPath();
        path.moveTo(points.get(0).x, points.get(0).y);

        for (int i = 1; i < points.size(); i++) {
            PointF pf = points.get(i);
            int rc = (int) (20 +(this.paintStrokeWidth/5));
            path.addCircle(pf.x, pf.y, (float) rc, Path.Direction.CCW);

        }
    }

Result: brush is same even move finger fast or slow

Solution 2:

Check the "colored_pixels" from here